Actuator assembly for electrohydraulic operation of cylinder valves
AssigneeVisteon Global Technologies, Inc.
InventorsWilliam Peter Donohue, Alfred Edmund Lynn, Gang Xu, Vijay Garg
Life of this patent
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Abstract
The present invention provides an actuator assembly for operating a cylinder valve of an internal combustion engine. The actuator assembly achieves fast response times by utilizing a solenoid actuator that contains an armature element formed of a powder metal. A valve system that utilizes two of the actuator assemblies in conjunction with a cylinder valve is also provided.
Claims22
A hydraulically operated valve system for an internal combustion engine having a cylinder bore, said system comprising:
- a high pressure source of fluid;
- a low pressure source of fluid;
- a first control valve assembly comprising a first stem valve moveable between open and closed positions and a first solenoid actuator having an armature element formed of a powder metal, the first control valve assembly being operably connected to the high pressure source of fluid;
- a second control valve assembly comprising a second stem valve moveable between open and closed positions and a second solenoid actuator having an armature element, the second control valve assembly being operably connected to the low pressure source of fluid;
- and
- a cylinder valve adapted to selectively provide fluid access to said cylinder bore and being operably connected to the first and second control valve assemblies such that the cylinder valve moves into an open position when the first stem valve is in the open position and the second stem valve is in the closed position.
A control assembly for operating a cylinder valve on an internal combustion engine, said control assembly comprising:
- a high pressure source of fluid;
- a low pressure source of fluid;
- a high pressure valve comprising a first stem valve and first bias spring;
- a low pressure valve comprising a second stem valve and a second bias spring;
- a high pressure fluid line communicating with the high pressure source of fluid, the high pressure valve, and said cylinder valve;
- a low pressure fluid line communicating with the low pressure source of fluid, the low pressure valve, and said cylinder valve;
- a first solenoid actuator adapted to move the first stem valve between open and closed positions, and having a first armature element formed of a powder metal;
- and
- a second solenoid actuator having a second armature element adapted to move the second stem valve between open and closed positions.
An actuator assembly for operating a cylinder valve of an internal combustion engine, said assembly comprising:
- a stem valve moveable between open and closed positions;
- a solenoid actuator having an armature element formed of a powder metal and adapted to control movement of the stem valve between the open and closed positions.
Dependencies are inferred from the claim text.